Plug for electric cord



FIG. 1 is a front elevational view of a plug with the new design applied thereto;

FIG. 2 is an elevational view of one side of the plug; the other side being identical thereto;

FIG. 3 is a rear elevational view of the plug, and

FIG. 4 is a top plan view thereof. 

The ornamental design for a plug for electric cord, as shown. 